KR20200043191A - Bidirectional Check Valve for Air Diffuser - Google Patents

Abstract

The present invention provides a check valve coupled between an air supply pipeline which is connected to an air supply means including a blower for supplying fine bubbles to an aeration tank where sewage or wastewater is stored, and each of a plurality of air diffusers which branch off from an air pipe to be coupled to the air supply pipeline. The check valve comprises: a housing coupled between the air diffusers in which a transfer medium flows in a normal direction from the air supply pipeline, which is upstream, to the air diffuser, which is downstream, and in a reverse direction opposite to the normal direction, and having a first flow path penetrated toward the air supply pipeline and a second flow path penetrated toward the air diffuser; and a blocking unit having a check flange coupled to the housing between the first flow path and the second flow path, a check body disposed at the center between the first flow path and the second flow path in the cross section of the pipeline, and a diaphragm having one side coupled to the check flange and the other side supporting the check body to elastically deform the check body toward the first flow path or the second flow path with respect to the check flange by corresponding to a pressure applied to the check body such that a normal direction flow or a reverse direction flow can be blocked. Therefore, the check valve has a simple structure and is easy to use in the case of blocking the flow in the reverse direction as well as in the normal direction, and can close the pipeline by rapidly coping with abrupt pressure changes in the normal direction or in the reverse direction.

Description

Bidirectional Check Valve for Air Diffuser}

The present invention relates to a two-way check valve, when the flow in the pipe for transporting a transport medium such as gas, liquid, etc. is made in the forward and reverse directions, and when an excessive flow in the forward or reverse direction acts on the pipe, forward or Particularly, it relates to a bidirectional check valve for a diffuser, in which the structure of the check valve is improved so that each of the reverse flows can be blocked.

Cars and airplanes are the means to move the things you need. In addition, one of the means for transporting the goods includes pipes that are variously applied to industrial facilities as well as areas closely related to life, such as the capital, in addition to these means of transportation.

The piping guides a transport medium, which is a transport target, including a fluid such as gas or liquid, in a closed space including a pipe, from a predetermined position to a required position.

In addition to the pipes connecting or branching pipes, the pipes also include a valve that opens or closes the pipes so that the transfer medium can be transported or installed in the pipes to flow or move along the pipes or to block the movement of the manual transport medium.

The valve is variously provided to be appropriately applied according to its function, structure, and type of transport medium, and the check valve is one of them.

The check valve functions to flow only in one direction to prevent back flow of the transport medium. Check valves are available in lift, swing, in-line, and angle types, and limit flow in one direction and flow in both directions. A bidirectional type may also be provided.

These check valves are used in aeration tanks (aeration tanks) that store and process wastewater. In order to supply air to the waste water stored in the aeration tank in the process of treating waste water and waste water, a number of air diffusers branched from the air supply pipes are arranged at intervals set in the entire area of the aeration tank, and the check valve is used to prevent air from being damaged. It is generally installed on the air supply piping side to prevent inflow of waste water and wastewater into the supply piping.

However, in the conventional technique in which such a check valve is installed, air is excessively and rapidly supplied to the damaged air diffuser when damage to the air diffuser occurs, thereby reducing the amount of air supplied to other air diffusers to perform the original function. There is a difficult problem. In this case, in order to prevent excessive air from being supplied to the damaged air pipe, it is preferable that the check valve is a two-way check valve, and in such a two-way check valve, the structure is simple and variously changed and can be utilized to increase the coverage. Do.

[Related documents]

Registered Patent Publication No. 10-0945412 (2010.03.05. Notice)

An object of the present invention is to provide a two-way check valve that is simple in structure and convenient to use when blocking flow in the reverse direction as well as in the forward direction.

In addition, another object of the present invention, it is possible to block the flow in the reverse direction as well as in the forward direction, it is possible to repair, replace, etc. in the state in which the flow is blocked, to prevent loss, contamination, etc. due to backflow, and the operation is easy and easy. It is to provide a two-way check valve that can reduce the economic cost of repair and the like.

In addition, another object of the present invention is to provide a two-way check valve capable of closing the piping in response to a sudden pressure change exceeding a range set in the forward direction or suddenly.

In addition, another object of the present invention is to provide a two-way check valve that can easily change the deformation force to be deformed to increase the range of use.

In addition, another object of the present invention is to provide a two-way check valve that can be easily attached to and detached from existing piping.

The object of the present invention is an air supply pipe connected to an air supply means including a blower for supplying micro-bubbles to an aeration tank storing waste water and waste water, and a plurality of acids branched from the air supply pipe and the air pipe and combined respectively. In the check valve coupled between the engines, the air supply pipes upstream from the air supply pipes downstream to the air pipes in the opposite direction to the air pipes are respectively coupled between the air pipes flowing through the air supply pipe and penetrated to the air supply pipe side. A housing having a first flow path and a second flow path penetrating the side of the diffuser; A check flange coupled to the housing between the first flow path and the second flow path, a check body disposed in the center between the first flow path and the second flow path in the horizontal direction of the pipe, and one side coupled to the check flange The other side supports the check body and elastically deforms the check body with respect to the check flange to the first flow path or the second flow path in response to the pressure acting on the check body, so that the forward or reverse flow can be blocked. It is achieved by a two-way check valve, characterized in that it comprises; a blocking portion having a diaphragm.

In addition, when any one of the diffusers is damaged and air rapidly flows into the damaged diffuser, a pressure exceeding the pressure set in the check body coupled to the front end of the damaged diffuser is applied to the air. It is preferable that the check body moves to the side of the diffuser, which is the second passage, to block air from flowing to the damaged diffuser.

In addition, when any one of the diffusers is damaged and the operation of the air supply means is stopped, the pressure of the water stored in the aeration tank is applied to the check body coupled to the damaged diffusers through a second flow path. It is preferable that the check body is moved to the first flow path to prevent the waste water from entering the air supply pipe.

In addition, the elastic deformation range of the diaphragm is set to be movable in the second flow path when the check body exceeds the set pressure range in the forward direction, which is a pressure range set to act on the pipe according to the forward flow. It is preferable that the check main body is set to be movable in the first flow path when the forward flow range is blocked or the forward flow range is blocked.

In addition, it is preferable that the cross section of the annular diaphragm includes a U-shape or a V-shape.

In addition, it is preferable that an auxiliary elastic part having an auxiliary elastic means capable of assisting an elastic deformation force elastically deforming to the first flow path side or the second flow path side of the check body is coupled to the housing.

On the other hand, the object of the present invention is a housing having a first flow path coupled to the upstream side and a second flow passage through the downstream side and coupled on a pipe through which the transport medium flows in the forward direction from upstream to downstream and in the reverse direction from downstream to upstream. ; A check flange coupled to the housing between the first flow path and the second flow path, a check body disposed in the center between the first flow path and the second flow path in the horizontal direction of the pipe, and one side coupled to the check flange The other side supports the check body and elastically deforms the check body with respect to the check flange to the first flow path or the second flow path in response to the pressure acting on the check body, so that the forward or reverse flow can be blocked. It is also achieved by a two-way check valve characterized in that it comprises; a blocking portion with a diaphragm.

According to the present invention, it is possible to provide a two-way check valve that is simple in structure and easy to use when blocking flow in the reverse direction as well as in the forward direction.

In addition, the flow can be blocked not only in the forward direction but also in the reverse direction, so repair and replacement can be performed while the flow is blocked, preventing loss, contamination, etc. due to backflow, easy and easy operation, and economical cost due to repair. It is possible to provide a bidirectional check valve that can be saved.

In addition, it is possible to provide a two-way check valve capable of closing the piping in response to a sudden pressure change exceeding a range set in the forward or reverse direction.

In addition, it is possible to provide a bidirectional check valve capable of easily changing the deforming force to be deformed to increase the application range.

In addition, it is possible to provide a two-way check valve that can be easily attached and detached to the existing piping.

1 is an exploded perspective view of a two-way check valve according to an embodiment of the present invention,
Figure 2 is an exploded cross-sectional view of Figure 1,
3a to 3c is a cross-sectional view for explaining the operation process of the two-way check valve,
Figure 4 is a cross-sectional view for explaining a two-way check valve according to another embodiment of the present invention,
5A and 5B are exploded perspective views and cross-sectional views for explaining a two-way check valve according to another embodiment of the present invention.

The two-way check valve 100 (hereinafter referred to as “check valve”) according to an embodiment and another embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 5B.

1 is an exploded perspective view of a two-way check valve according to an embodiment of the present invention, FIG. 2 is an exploded cross-sectional view of the exploded view of FIG. 1, and FIGS. 3A to 3C are cross-sectional views for explaining an operation process of the two-way check valve 4 is a cross-sectional view for explaining a two-way check valve according to another embodiment of the present invention, and 5a and 5b are exploded perspective views and a cross-sectional view for explaining a two-way check valve according to another embodiment of the present invention. .

In the following description, for convenience of description, in FIG. 1, the vertical direction of the check valve 100 is set to the “Z” axis direction, the left and right directions to the “X” axis direction, and the front-rear direction to the “Y” axis direction. In addition, for convenience of explanation, the location close to the starting point from which the transfer medium is started to be transferred, such as water flow along the direction in which the transfer medium flows, is set to 'upstream', and a place close to the destination where the transfer medium is transferred is set to 'downstream'. Accordingly, hereinafter, the 'forward' flow means that the transport medium flows or moves or is transferred from 'upstream' to 'downstream', and the 'reverse' flow flows or moves from 'downstream' to 'upstream' It means being transferred. In addition, for convenience of explanation, the check valve 100 coupled to each aeration pipe 10 upstream of the aeration tank for storing waste water when necessary is described below, but the check valve 100 of the present invention accommodates such waste water. It does not apply only to aeration tanks.

The check valve 100 according to an embodiment of the present invention, as shown in Figures 1 and 2, is coupled on the pipe through which the conveying medium flows in the forward direction from upstream to downstream and in the reverse direction from downstream to upstream. A housing 110 having a first passage 113a penetrating to the side and a second passage 115a penetrating to the downstream side; A check flange 131 coupled to the housing 110 between the first flow path 113a and the second flow path 115a, and the first flow path 113a and the second flow path 115a in the horizontal direction of the pipe ) Is provided in the center of the check body 133 disposed in the annular, one side is coupled to the check flange 131 and the other side supports the check body 133 to the pressure acting on the check body 133 Correspondingly, the check body 133 is elastically deformed to the first flow path 113a or the second flow path 115a with respect to the check flange 131, and the diaphragm 135 is provided to block the forward or reverse flow. It is preferable to include; a blocking unit 130 having a.

The housing 110 includes a first housing 113 having a first flow path 113a and a second housing 115 having a second flow path 115a. The first housing 113 and the second housing 115 are mutually coupled by, for example, the second coupling means 115c, which is a female screw, and the first coupling means 113c, which is a male screw, and the first housing 113 and the first housing 113. 2 The housing 115 is coupled to block the blocking part flow space 150 (refer to FIGS. 3A to 3C), which is a space in which the blocking part 130 is movable between the first flow passage 113a and the second flow passage 115a. The unit 130 may be arranged and coupled to block the transport medium in both directions as described below.

The material of the housing 110 is preferably selected from a variety of known materials, such as stainless steel, iron, synthetic resin, etc., depending on the purpose, transport medium, and the like.

The first housing 113 may further include a flange coupling portion 117 provided to correspond to the shape of the check flange 131 and capable of coupling the check flange 131. The flange coupling portion 117 may be provided in the second housing 115, or may be provided in the first housing 113 and the second housing 115.

In addition, a first catching protrusion 133b1 and a second catching protrusion 133b2 formed in the check body 133 operating in the blocking part flow space 150 may be in contact with the first housing 113 and the second housing 115. The first engagement sheet 113b and the second engagement sheet 115b are provided so that the pair of locking protrusions 113b and the pair of engagement sheets 133b and 115b1 are engaged so that the transport medium is the first flow passage 113a. It is possible to block the movement to the side and the second flow path 115a, respectively.

Here, the engagement sheet (113b, 115b) is heard as an example of having a flat surface, but may be provided in a recessed shape corresponding to the shape of the protruding locking protrusion (113b), or the reverse of the engagement sheet (113b, 115b) ) And the locking protrusion 113b may be provided.

The second housing 115 has a downstream pipe in the second flow path 115a on the downstream side, for example, as shown in FIG. 1, as shown in FIG. 1, the diffuser support portion 115d to which the diffuser 10 can be coupled ) And the diaphragm support portion 115e of an inclined shape may be provided so that the U-shape of the diaphragm 135 contacts and elastic deformation is limited.

Although not shown, a sealing means including an O-ring capable of maintaining airtightness in a state where the first housing 113 and the second housing 115 are combined and coupled may be further provided.

The blocking part 130 is an essential part of the present invention, and as described above, is composed of a check flange 131, a check body 133, and a diaphragm 135. The material of the blocking part 130 is elastically deformable and preferably has corrosion resistance by a transporting medium to be transported, and includes, for example, NBR.

The check flange 131 is provided in a ring shape and is coupled between the first housing 113 and the second housing 115 in a state engaged with the flange coupling portion 117 of the first housing 113. The check flange 131 not only supports the check body 133 and the diaphragm 135, but also presses the first housing 113 and the second housing 115 while the first housing 113 is pressed as needed. And it may function to maintain the airtight between the second housing 115 is coupled.

The diaphragm 135 is provided with an elastically deformable material so that the outside of the diaphragm 135 is coupled with the check flange 131 and the inside is coupled with the check body 133. The diaphragm 135 includes, for example, a ring shape or a ring shape having a “U” shape and a “V” shape cross section, as shown in FIGS. 1 and 2, and may be provided in various shapes as necessary. Due to this structure, the diaphragm 135 is elastically deformed with respect to the check flange 131 fixed according to the pressure acting on the check body 133, so that the check body 133 is the first flow path 113a or the second flow path 115a. ) Side.

The diaphragm 135 has a plurality of through passages 135a through which the first passage 113a and the second passage 115a can be communicated.

On the other hand, the diaphragm 135 may form a forward elastic deformation force for elastic deformation in the forward direction and a reverse elastic deformation force for elastic deformation in the reverse direction. For example, the diaphragm 135 may integrally form two layers of materials having different elastic deformation forces to make the forward or reverse elastic deformation forces different.

The check body 133 is composed of a body frame 133a, a locking projection 113b, and a blocking pressure adjusting unit 133c.

The main body frame 133a is combined with the diaphragm 135 and is formed in a disc shape as a whole to support other components of the check body 133.

The locking protrusion 113b is in contact with the first engagement sheet 113b and the second engagement sheet 115b of the housing 110, and the first flow passage 113a side or the first pressure caused by external pressure acting on the blocking portion 130. 2 is formed to protrude at positions corresponding to the first engagement sheet 113b and the second engagement sheet 115b from both sides of the disk-shaped end side plate surface so as to block the passage 115a side.

According to this configuration, when the external pressure exceeding the externally set pressure acts on the blocking portion 130, the blocking portion 130 moves to the first flow path 113a side and the second flow path 115a side, thereby causing the first engagement sheet 113b. ) And the second engagement sheet 115b and the first catching protrusion 133b1 and the second catching protrusion 133b2 contact each other to flow the transport medium transferred to the first flow path 113a and the second flow path 115a. Simple and convenient blocking.

The blocking pressure adjusting unit 133c, which is an example of an auxiliary elastic unit having an auxiliary elastic means capable of assisting an elastic deformation force elastically deforming to the first channel 113a side or the second channel 115a side of the check body 133, is , It is configured to be coupled to the central portion of the body frame 133a, for example, in the shape of a disc, to increase the self-weight of the body frame 133a. That is, the blocking pressure control unit 133c is coupled to the control unit coupling unit 133a1 of the main frame 133a to increase the self-weight of the blocking unit 130, thereby acting on the pressure or the first flow path 113a acting on the blocking unit 130. ) If the increase or decrease of the force blocking the second flow path 115a is required, the self-weight of the blocking pressure adjusting unit 133c can be appropriately adjusted.

That is, the check valve 100 is installed in the 'Z' direction as shown in FIGS. 1 and 2, the force acting on the central axis of the pipe is up and down, the bottom is 'upstream', and the top is 'downstream'. In this case, it is assumed that the pressure set to transfer the transport medium and the pressure blocking the first flow path 113a or the second flow path 115a is controlled by acting on the pipe in the vertical direction. In this case, if the force closing the second flow path 115a on the downstream side is large, the self-weight of the blocking portion 130 must be increased, so the weight of the blocking pressure adjusting portion 133c is assumed to be heavy, in this case, When the acting force disappears (for example, when the supply of air supplied from the upstream side to the downstream is stopped), the first flow path in which the blocking portion 130 is the upstream side because the weight of the blocking portion 130 is heavy. The possibility of blocking the first flow path 113a is likely to be close to 113a), and the force of blocking the first flow path 113a will be very effective when the force of the reverse flow flows. On the other hand, when the force closing the second flow path 115a on the downstream side is small, the weight of the blocking pressure regulating portion 133c should be made lighter since the self-weight of the blocking portion 130 should be reduced more than the above-described example, In this case, when the force acting on the pipe disappears (for example, when stopping supply of air supplied from the upstream side to the downstream side), the blocking portion 130 is upstream because the weight of the blocking portion 130 is light. The probability of blocking the first flow path 113a is less likely to block the first flow path 113a, and the ability to block the first flow path 113a may be less effective than the above-described example when the force of the reverse flow flows. will be.

It is preferable that the first axis 113a, the second channel 115a, and the central axis CL of the blocking unit 130 are the same axis as the central axis of the pipe.

Here, according to the normal pressure of the transport medium moving along the forward flow or the reverse flow, the degree of rapid pressure increase, the target flow path cutoff pressure, etc., the material and thickness of the diaphragm 135, the size and number of the through passage 135a, It is preferable to appropriately set the size or weight of the blocking pressure adjusting unit 133c, the shape of the engaging projection 113b, the contact area, and the like.

The operation process of the check valve 100 according to an embodiment of the present invention having such a configuration will be described in detail with reference to FIGS. 3A and 3C.

First, in order to generate micro-bubbles in the aeration engine 10 of the aeration tank (not shown), the air supply pipe (Fig. 1 and Fig. 2) of the air as a transport medium is piped through an air generating means including an air compressor not shown. (Refer to '30'), and each of the air pipes is branched from the air supply pipe 10 and branched from the air supply pipe 30, so that the check valve 100 according to the present invention is upstream of the air pipe 10 It is assumed that the check valve 100 and the air diffuser 10 are positioned in the vertical direction 'Z' axis direction as shown in FIGS. 1 and 2 (that is, the upstream side is the air supply pipe side, the downstream side is the air diffuser) Observation) and the diffuser 10 is assumed to be immersed in the depth set in the wastewater of the aeration tank in which wastewater is stored.

As shown in Figure 3a, when air is supplied to the check valve 100, the air as a transport medium passes through the first flow path 113a and, while acting on the check body 133 of the blocking part 130, On the other hand, through the plurality of through passages (135a) through the diaphragm (135) passes through the second passage (115a) is supplied to the aeration engine (10).

The check valve 100 can be operated normally according to the depth and pipe of the diffuser 10, the pressure loss of the check valve 100 and the diffuser 10, and the depth of the diffuser 10, such as the diaphragm 135 This is because the elastic deformation force of), the set supply pressure of air as the conveying medium to be supplied, and the self-weight of the blocking unit 130 are determined.

In this case, the gap between the first engaging projection (133b1) and the first engaging seat (113b) and the second engaging projection (133b2) and the second engaging seat (115b), respectively, as shown in Figure 3a, 'GAP 1 It is illustrated as' and 'GAP 2' so that air flows through the gaps (GAP 1 and GAP 2) and through passage (135a).

In this normal air flow, if any one of the diffuser 10 is damaged and the air rapidly flows into the damaged diffuser 10, as shown in FIG. 3B, through the first flow path 113a The pressure of rapidly flowing air (refer to 'F3' in FIG. 3B) acts as a force to press the check body 133 of the blocking unit 130 to move the check body 133 toward the second flow path 115a. It works by force. Of course, even in this case, some of the air tries to flow through the through passage 135a of the diaphragm 135, but does not overcome the sudden air pressure acting on the check body 133. Due to the movement of the check body 133, the second catching protrusion 133b2 is pressed into the second engagement sheet 115b and the passage from the through passage 135a to the second passage 115a is blocked so that the first passage is blocked. The flow of air from the flow path 113a to the second flow path 115a may be blocked.

That is, as shown in Figure 3b, the blocking portion 130 moves from the blocking portion flow space 150 to the second flow path (115a) side, the second catching projection (133b2) and the second engagement sheet (115b) are in close contact The first engaging projection 133b1 and the first engagement sheet 113b on the first flow path 113a side generate a larger gap (refer to 'GAP 3' in FIG. 3B) than in FIG. 3A.

In such an abnormal state, the check body 133 moved to the side of the diffuser 10 moves to the side of the second flow path 115a due to the suddenly increased air pressure due to the rapid air flow, and blocks the second flow path 115a. Even if the pressure set in the supply pipe 30 acts, the reverse elastic force to return to the original position of the diaphragm 135 acts more, so that the state in which the second flow path 115a is blocked can be maintained.

In this way, if air is not supplied to the side of the mountain engine 10, the manager managing the aeration tank can visually determine the location of the mountain engine 10 where air is not ejected to the atmosphere, and when the supply of air is stopped, the damaged acid identified The engine 10 can be replaced.

When the supply of air, which is the transport medium to the air supply pipe, is stopped in the same state as in FIG. 3B, since the pressure of the air acting on the check body 133 is eliminated, the check body 133 has its own weight and a damaged air pipe 10 The blocking part 130 is pressed from the downstream to the upstream side (from top to bottom) by the action of the pressure (head, water head) of the water flowing through. This pressing force (refer to 'F4' in FIG. 3C) overcomes the elastic deformation force of the diaphragm 135 and moves the check body 133 toward the first flow path 113a as shown in FIG. 3C to block the first flow path 113a. · It is possible to prevent the wastewater from flowing into the air supply pipe through the first flow path 113a.

That is, as shown in Figure 3c, the check body 133 moves from the blocking portion flow space 150 toward the first flow path 113a so that the first catching projection 133b1 and the first engagement sheet 113b are in close contact. The second locking protrusion 133b2 and the second engagement sheet 115b on the second flow path 115a side generate a larger gap (see 'GAP 4' in FIG. 3C) than in FIG. 3A.

In this state, the manager can replace the damaged diffuser 10, and even in this process, since the check valve 100 prevents backflow, waste water can be prevented from flowing back into the air supply pipe even during replacement. have.

However, here, the position of the check valve 100 in a state in which supply of the supplied air is stopped without any damage or the like of any of the diffusers 10 coupled to each check valve 100 is located at the position of FIG. 3C. It can be positioned, the position of Figure 3c and Figure 3a position between the elastic force of the diaphragm 135, the size and number of the through-passage (135a), the pressure of the cut-off pressure adjusting section (133c) to adjust appropriately It is preferred. It is preferable that these positions are appropriately adjusted according to the type of transport medium to be transported, the purpose of the piping, and how to maintain the transport medium when pressure is applied to the piping and when pressure is released.

Accordingly, according to the present invention, it is possible to provide a two-way check valve that is simple in structure and easy to use, which can block flow in both the forward and reverse directions.

In addition, the flow can be blocked not only in the forward direction but also in the reverse direction, so repair and replacement can be performed while the flow is blocked, preventing loss, contamination, etc. due to backflow, easy and easy operation, and economical cost due to repair. It is possible to provide a bidirectional check valve that can be saved.

In addition, it is possible to provide a two-way check valve capable of closing the pipe in response to a sudden change in pressure or exceeding a range set in the forward direction.

In addition, it is possible to provide a bidirectional check valve capable of easily changing the deforming force to be deformed to increase the application range.

In addition, it is possible to additionally provide a two-way check valve that can be easily attached and detached from the existing piping.

The check valve 200 according to another embodiment of the present invention, as shown in FIG. 4, is installed in the vertical direction of the above-described embodiment (the 'Z' axis is the central axis of the pipe), the horizontal direction (' The X 'axis is the central axis of the piping, and the' Y 'axis can also be the central axis of the piping) .Although not shown, it is not shown for the' X 'axis,' Y 'axis, or' Z 'axis. Of course, it can be applied to photo piping.

4, only the installed direction is different from the above-described example, and thus, since the configuration and operation principle are the same, a detailed description is omitted below, and the reference number differs only in the first unit (one hundred units) and the rest of the units are the same. In this case, unlike the above-described example, the self-weight of the blocking unit 130 acts in the vertical direction, but according to the forward flow of the pipe (see 'Fa' in FIG. 4) or the reverse flow (see 'Fb' of FIG. 4) The direction of the pressure of the piping acting on 130 is different in that it is a horizontal direction.

The spring body 333d, which is another example of the auxiliary elastic part having an auxiliary elastic means capable of assisting the elastic deformation force elastically deforming to the first passage 313a side or the second passage 315a side of the check body 333, is included. The check valve 300 is shown in FIGS. 5A and 5B.

In the case of this embodiment, the reference number is the same as in the above-described embodiment except for the hundreds unit, which is the first digit, and it is assumed that there is no specific description, and a detailed description of the same configuration is omitted.

First, the control part coupling portion 333c of the check body 333 is made of the same synthetic resin or steel material as the material of the check body 333, and the plate-like plate on the first flow path 313a side and the second flow path 115a side ( 333c1) and the lower plate 333c2 are combined, respectively.

The spring deformation portion 333d includes an elastic member 333d1 including a spring having an elastic deformation force, and an elastic member 333d1 of a transport medium in which the elastic member 333d1 is pressed from the first flow path 313a side or the second flow path 315a side. An elastic support member (333d2) coupled to the check body 333 to be elastically deformable by pressure and an elastic support member (Adjustable to adjust the elastic force of the elastic member 333d1 coupled to the elastic member 333d1) It is preferable that the elastic adjustment member 333d3 coupled to 333d2) and the elastic member coupling member 333d4 are provided so that the elastic member 333d1 is coupled to the check body 333.

The elastic member 333d1 includes a spring, and whether the type of spring is to be a compression spring or a tension spring is the type of pressing force that presses the check body 333, the direction in which the spring is coupled, the elastic deformation force of the diaphragm 335, the forward direction. Alternatively, it is preferable to select in consideration of the purpose of the reverse check.

The elastic support member 333d2 functions to support the elastic member 333d1 so that the elastic member 333d1 is elastically deformed against the housing 110, and in this embodiment, the second housing ( The plate shape extended to the central axis of the second flow path 315a in 315) may be variously modified in an example or a range capable of achieving the technical idea.

The elastic adjustment member 333d3 is screwed to the elastic support member 333d2 to adjust the elastic deformation force of the elastic member 333d1, so that the position of the elastic support member 333d2 can be moved, so that the elastic adjustment member 333d3 The combined elastic member 333d1 can adjust the elastic force to compress or stretch the check body 333. Since the groove of '-' or '+' shape is formed on the upper side of the elastic adjustment member 333d3, the elastic adjustment member 333d3 can be easily used as a corresponding screw driver.

The elastic member coupling member 333d4 may be rigidly coupled to the plate surface of the lower plate 333c2, for example, but may be modified in various shapes.

In the above embodiment, it is exemplified that the spring deformed portion 333d is coupled to the second flow path 315a, but the spring deformed portion 333d is the first flow path 313a or the first housing in a range that does not impair the technical spirit ( 313).

Through this embodiment, the check body 333 can be more stably moved to the first flow path 313a and the second flow path 315a.

That is, for example, as described above, after any one of the air pipes is broken and a sudden pressure change or flow rate change is issued to the damaged air pipe side, and the check body 333 closes the second flow path 315a side. The closing force capable of continuously closing the second flow path 315a side can be adjusted in the spring deformation portion 333d so as to maintain a pressure balance with the remaining undamaged diffuser.

Although various embodiments of the present invention have been described and described herein, it will be appreciated that those skilled in the art having ordinary skill in the art may modify the present embodiment without departing from the principles or spirit of the present invention. The scope of the invention will be defined by the appended claims and their equivalents.

100: check valve 10: diffuser
30: air supply pipe
110: housing 113: first housing
113a: 1st passage 113b: 1st biting sheet
113c: first coupling means 115: second housing
115a: 2nd passage 115b: 2nd bit sheet
115c: second coupling means 115d: air diffuser support
115e: diaphragm support 117: flange coupling
130: blocking unit 131: check flange
133: check body 133a: body frame
133a1: Adjusting part engaging portion 133b: engaging projection
133b1: first catching protrusion 133b2: second catching protrusion
133c: blocking pressure control unit
135: diaphragm 135a: through passage
150: blocking space
333c: Main plate 333c1: Upper plate
333c2: lower plate
333d: spring elastic part 333d1: elastic member
333d2: elastic support member 333d3: elastic adjustment member
333d4: elastic member coupling member

Claims (7)

The air supply pipe connected to the air supply means including a blower for supplying micro bubbles to the aeration tank storing waste water and the air supply pipe and the air supply pipe are branched from the air pipe and are coupled between a plurality of air pipes respectively combined. In the check valve,
A first flow passage coupled to the air supply pipe flowing through the air supply pipe side and passing through the air supply pipe side and the first flow path passing through the air supply pipe side, respectively, in a direction opposite to the forward direction from the air supply pipe upstream to the air pipe downstream. A housing having 2 euros;
A check flange coupled to the housing between the first flow path and the second flow path, a check body disposed in the center between the first flow path and the second flow path in the horizontal direction of the pipe, and one side coupled to the check flange The other side supports the check body and elastically deforms the check body with respect to the check flange to the first flow path or the second flow path in response to the pressure acting on the check body, so that the forward or reverse flow can be blocked. A two-way check valve comprising a; a blocking unit having a diaphragm. According to claim 1,
When any one of the diffusers is damaged and air rapidly flows into the damaged diffuser, a pressure exceeding the pressure set in the check body coupled to the front end of the damaged diffuser is applied to the check body Bi-directional check valve, characterized in that to move to the side of the second flow path to the side of the diffuser to block air from flowing to the damaged diffuser side. According to claim 1,
When any one of the air diffusers is damaged and the operation of the air supply means is stopped, the pressure of the water stored in the aeration tank is applied to the check body coupled to the damaged air pipes through a second flow path to check the air. A two-way check valve, characterized in that the main body moves to the first flow path to block wastewater from entering the air supply pipe. The method of claim 2 or 3,
The elastic deformation range of the diaphragm,
If the pressure exceeds the set forward pressure range, which is a pressure range that is set to be able to act on the pipe according to the forward flow, the check body is set to be movable in the second flow path
A two-way check valve, characterized in that the check body is set to be movable in the first flow path when the set flow is exceeded or the forward flow is blocked, which is a pressure range set to act on the pipe according to the reverse flow. According to claim 4,
The annular diaphragm end face comprises a U-shaped or V-shaped bidirectional check valve. The method of claim 5,
A two-way check valve, characterized in that an auxiliary elastic part having an auxiliary elastic means capable of assisting an elastic deformation force elastically deforming to the first flow path side or the second flow path side of the check body is coupled to the housing. A housing having a first passage through the upstream side and a second passage through the downstream side, coupled to the pipe through which the transport medium flows in the forward direction from the upstream to the downstream and in the reverse direction from the downstream to the upstream;
A check flange coupled to the housing between the first flow path and the second flow path, a check body disposed in the center between the first flow path and the second flow path in the horizontal direction of the pipe, and one side coupled to the check flange The other side supports the check body and elastically deforms the check body with respect to the check flange to the first flow path or the second flow path in response to the pressure acting on the check body, so that the forward or reverse flow can be blocked. A two-way check valve comprising a; a blocking unit having a diaphragm.

Images